CN117588352A - Large-air-volume noise-reduction vibration-reduction fan blade grid flexible connection structure and self-adjusting method thereof - Google Patents

Large-air-volume noise-reduction vibration-reduction fan blade grid flexible connection structure and self-adjusting method thereof Download PDF

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Publication number
CN117588352A
CN117588352A CN202311552043.6A CN202311552043A CN117588352A CN 117588352 A CN117588352 A CN 117588352A CN 202311552043 A CN202311552043 A CN 202311552043A CN 117588352 A CN117588352 A CN 117588352A
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CN
China
Prior art keywords
sleeve
blade
piece
blade grid
shaft
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Granted
Application number
CN202311552043.6A
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Chinese (zh)
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CN117588352B (en
Inventor
何润丰
何平
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Jiangsu Kechuang Electric Appliance Co ltd
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Jiangsu Kechuang Electric Appliance Co ltd
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Priority to CN202311552043.6A priority Critical patent/CN117588352B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0691—Rotors characterised by their construction elements of the hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

The invention relates to a wind power linking technology, in particular to a flexible connection structure of a blade grid of a large-air-volume noise-reduction damping fan and a self-adjusting method thereof, wherein a convex shaft in the connection structure is connected with a combined sleeve through a torsion abdication assembly and an offset assembly respectively, and when the blade grid works, the blade grid is flexibly twisted, so that overload torsional aerodynamic resistance and torsional vibration of the blade grid are reduced; when the blade cascade works, the blade cascade flexibly deflects, and overload rotation resistance and deflection vibration of the blade cascade are relieved. The torsion abdication component is utilized to reduce overload torsion aerodynamic resistance of the blade grating, and rigid yielding deformation and torsion fracture of the blade grating are avoided as much as possible; and the overload torsional vibration noise of the blade cascade is relieved. The deflection assembly mitigates the overload rotational resistance and yaw shock of the cascade. The upper abutting piece and the lower abutting piece act on the high-strength spring respectively, so that the torsion resistance and the deflection resistance of the blade grid are mutually restrained, and the blade grid is prevented from being greatly twisted and deflected.

Description

Large-air-volume noise-reduction vibration-reduction fan blade grid flexible connection structure and self-adjusting method thereof
Technical Field
The invention relates to a wind power linking technology, in particular to a flexible connection structure of a blade grid of a large-air-quantity noise-reduction shock-absorption fan and a self-adjusting method thereof.
Background
One of the main factors affecting the reliability and life of the fan cascade is the aerodynamic loading of the cascade; due to the uncertainty and complexity of the ambient wind, in recent years, the blade is damaged or destroyed due to the action of pneumatic load during the working process.
In the design of the blade cascade, the blade cascade not only needs enough rigidity and strength to ensure the working reliability; the requirements are low cost, light weight and flexibility, and the two are mutually restricted but interdependent; wherein the ambient air flow created by the wind in the atmosphere is a random turbulent motion; the characteristics of wind include an average wind characteristic and a pulsating wind characteristic, wherein the average wind characteristic is divided into an average wind speed and an average wind direction; the pulsating wind characteristics are classified into pulsating wind speed, pulsating coefficient, turbulence intensity, etc.
If the uncertainty and the complexity of the environmental wind are considered, the specific parameters related to the rigidity and the strength of the blade cascade cannot be defined in the process of designing the blade cascade; thus, in the actual design process, the actual stiffness and strength design parameters of the blade cascade are calculated by referring to the established average wind characteristics or parameters in the static wind environment.
However, in the practical application process, the influence of environmental wind, especially the influence of turbulent pulsating wind, is unavoidable; when the pulsating wind acts on the blade cascade, the load of the blade cascade changes in real time to fluctuate; on the one hand, the blade cascade is easy to yield deformation and even fracture (including torsion fracture and fracture), and on the other hand, the fluctuating load can also lead the blade cascade to vibrate greatly to generate noise.
Disclosure of Invention
The invention aims to provide a flexible connection structure of a blade grid of a large-air-volume noise-reduction vibration-reduction fan and a self-adjusting method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the flexible connection structure of the blade grid of the large-air-volume noise-reduction and vibration-reduction fan comprises a combined sleeve, wherein the combined sleeve is formed by coaxially and detachably connecting an upper connecting sleeve and a lower connecting sleeve; one end of the combined sleeve is fixedly provided with a mounting disc, and a plurality of blade grids are arranged on the mounting disc along the circumference in an equidistant mode;
the blade grid is fixedly connected with the inserting fixing piece through bolts, and the inserting fixing piece is fixedly inserted with a convex shaft along the length direction of the inserting fixing piece;
the convex shaft is connected with the combined sleeve through a torsion abdication component and an offset component respectively, wherein the torsion abdication component is used for allowing the blade grid to flexibly twist around the axis of the convex shaft when the blade grid works so as to reduce overload torsion aerodynamic resistance and torsion vibration of the blade grid;
the deflection assembly is configured to permit a compliant deflection of the cascade against a direction of rotation of a central axis of the cascade winding assembly when the cascade is in operation to mitigate overload rotational resistance and yaw shock of the cascade.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: a plurality of extending pieces are fixedly arranged at the edge of the mounting plate along the circumference at equal intervals, and the offset assembly comprises a bearing piece which is rotationally connected with the extending pieces; the convex shaft is rotatably arranged on the supporting piece so as to enable the blade grid to be connected with the supporting piece;
the bearing piece is fixedly provided with a pin shaft, and is rotationally connected with the extension piece through the pin shaft;
the biasing assembly further includes a biasing spring structure connecting the assembly and the support.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: the deflection elastic structure comprises a lower joint bowl fixedly arranged at one end of the supporting piece, an upper joint bowl capable of sliding along the axial direction of the upper connecting sleeve, an upper abutting piece arranged at the inner top end of the combined sleeve and in sliding fit with the inside of the combined sleeve, a lower abutting piece arranged at the inner bottom end of the combined sleeve and in sliding fit with the inside of the combined sleeve, a connecting rod with two ends respectively connected with the upper joint bowl and the lower joint bowl in a ball joint manner, and a high-strength spring arranged between the upper abutting piece and the lower abutting piece;
the high-strength spring is extruded by the upper abutting piece and the lower abutting piece in the combined sleeve, a through groove is formed in the upper circumferential direction of the upper connecting sleeve along the axial direction of the upper connecting sleeve, the upper joint bowl is fixed on one end of the support arm, the support arm penetrates through the through groove, the other end of the support arm is fixed with the upper abutting piece, and the support arm is in sliding fit with the through groove.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: the lower part of the lower abutting piece is fixedly provided with a sliding rod, a lining ring is integrally arranged below the inner part of the lower connecting sleeve, a sliding hole is formed in the lining ring, and the sliding rod is in sliding insertion with the sliding hole.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: the torsion abdication assembly comprises a transmission mechanism, a rotating sleeve connected with the transmission mechanism and rotatably arranged on the lower connecting sleeve, and a spiral structure connected with the rotating sleeve and the lower abutting piece;
the transmission mechanism is connected with one end of the protruding shaft penetrating out of the hoop, a circle of annular concave is arranged outside the lower connecting sleeve, and the rotating sleeve is rotationally embedded in the annular concave; the spiral structure is used for driving the lower abutting piece to move upwards in the combined sleeve when the rotating sleeve rotates.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: the annular recess is provided with a hollowed-out groove communicated with the inside of the combined sleeve;
the spiral structure comprises a spiral groove formed in the outer wall of the lower abutting piece, a third roller which is embedded in the spiral groove in a rolling way, and a hemispherical pit formed in the inner wall of the rotating sleeve;
the third roller is embedded in the spiral groove in a rolling way towards the inner half part of the combined sleeve, and the outer half part of the combined sleeve passes through the hollowed-out groove to be embedded with the hemispherical pit.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: the transmission mechanism comprises a universal coupling structure, one end of the universal coupling structure is connected with the convex shaft, and the other end of the universal coupling structure is connected with the driven shaft;
a bevel pinion is fixed at one end of the driven shaft, the driven shaft is rotatably installed on a panel, and the panel is fixed at the edge of the installation disc;
the outer part of the rotating sleeve is fixedly provided with a ring sleeve, the lower end of the ring sleeve is provided with a large bevel gear, and the large bevel gear is meshed with the small bevel gear.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: a clamping sleeve structure is fixedly arranged on the panel, and the driven shaft is in running fit with the clamping sleeve structure; the cutting sleeve structure comprises an upper cutting sleeve and a lower cutting sleeve which are detachably connected, and side edges of the cutting sleeve structure are in equidistant rolling fit with a plurality of second rollers along the circumference;
the driven shaft is provided with the flange in an integral way far away from the one end of bevel pinion, the second roller on one side of the cutting sleeve structure is in rolling fit with the flange, and the second roller on the other side of the cutting sleeve structure is in rolling fit with the side wall of the bevel pinion.
The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises the following components: the universal coupling structure comprises a first U-shaped piece, a first cross rotating shaft, a second U-shaped piece, a first plug bush, a key shaft, a second plug bush, a third U-shaped piece and a second cross rotating shaft;
one end of the first U-shaped piece is fixedly connected with the protruding shaft, the other end of the first U-shaped piece is in running fit with two longitudinal ends of the first cross rotating shaft, and two transverse ends of the first cross rotating shaft are in running fit with one end of the second U-shaped piece;
the other end of the second U-shaped part is fixedly provided with a first plug bush, the inner wall of the first plug bush is provided with a key slot, and the first plug bush is in telescopic sliding fit with one end of a key shaft through the key slot on the first plug bush;
the inner wall of the second plug bush is also provided with a key slot, and the second plug bush is in telescopic sliding fit with the other end of the key shaft through the key slot on the second plug bush;
the second plug bush is fixed at one end of the third U-shaped piece, the other end of the third U-shaped piece is rotationally connected with two transverse ends of the second cross rotating shaft, and two longitudinal ends of the second cross rotating shaft are rotationally connected with one end of the fourth U-shaped piece;
the other end of the fourth U-shaped piece is fixedly connected with the driven shaft.
A method for self-adjusting a blade grid of a large-air-volume noise-reduction and vibration-reduction fan by using the flexible connecting structure comprises the following steps: when the moment of the upper abutting piece and the lower abutting piece acting on the high-strength spring breaks through the initial pre-pressing elastic force of the high-strength spring, the upper abutting piece slides downwards, the lower abutting piece slides upwards, the high-strength spring is further compressed, the blade grid is twisted and deflected to give way, and the overall resistance of the blade grid is reduced; meanwhile, the high-strength spring is utilized to further compress and absorb energy, so that deflection vibration and torsion vibration of the blade cascade are reduced.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the blade grid of the fan runs under the overload and ultrahigh load conditions by using the torsion abdication component, so that the blade grid can be allowed to flexibly twist around the axis of the convex shaft, the overload torsion aerodynamic resistance of the blade grid is reduced, and the rigid yield deformation and torsion fracture of the blade grid are avoided as much as possible; in addition, the overload torsional vibration of the blade cascade can be relieved, and the noise is reduced.
An offset assembly is designed in the present invention to allow for flexible deflection of the cascade against the direction of rotation of the central axis of the cascade winding assembly to mitigate overload rotational resistance and yaw shock of the cascade.
In addition, the upper abutting piece and the lower abutting piece act on the high-strength spring respectively, so that the torsion resistance and the deflection resistance of the blade grid have the effect of mutual drag, and the blade grid is prevented from being greatly twisted and deflected.
Drawings
Fig. 1 is a schematic structural diagram of a flexible connection structure of a blade grid applied to a large-air-volume noise-reduction damping fan.
Fig. 2 is a schematic view of the structure of fig. 1 in another orientation.
Fig. 3 is a front view of a flexible connection structure of a blade cascade and the blade cascade reserved only in one group on a large-air-quantity noise-reduction damping fan.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a schematic view of the structure of the blade grid after being detached from the inserting fixing member on the basis of fig. 4.
FIG. 6 is a schematic view of another orientation of the cascade removed from the system of FIG. 5.
Fig. 7 is a schematic structural view of the upper and lower connecting sleeves in the combined set after being detached on the basis of fig. 6.
Fig. 8 is a schematic structural view of the parts detached from the upper connecting sleeve and the extension member, respectively, on the basis of fig. 7.
FIG. 9 is a schematic illustration of the male shaft, ferrule, and ferrule after disassembly.
Fig. 10 is a schematic view of the first roller from the side of the envelope of fig. 9.
Fig. 11 is a schematic view of the locking member of fig. 9 removed from the male fastener element.
Fig. 12 is a schematic view of a part of the structure of the transmission mechanism.
Fig. 13 is a schematic view of a male shaft and universal joint structure connection.
Fig. 14 is a schematic view of the universal joint structure after disassembly.
Fig. 15 is a detailed exploded view of the connection of the second U-shaped member and the third U-shaped member via the key shaft.
Fig. 16 is a schematic view of the ferrule structure after disassembly.
Fig. 17 is a schematic view of the structure of fig. 16 in another orientation.
Fig. 18 is a schematic view of the combined kit and its internal structure in half-section.
Fig. 19 is an exploded view of the component part of fig. 18 after being disassembled.
Fig. 20 is a schematic view of the other view of fig. 19.
Fig. 21 is a partially disassembled view of the kit and its internal structure.
Fig. 22 is a schematic view of the lower connection sleeve and the annular recess thereon.
Fig. 23 is a schematic view of the lower interference member of the lower connecting sleeve shown in fig. 22 after being removed.
Fig. 24 is a schematic view of the structure of fig. 23 from different angles.
In the figure: 1. leaf grating; 2. an upper connecting sleeve; 3. a lower connecting sleeve; 301. an annular recess; 302. a hollow groove; 303. a backing ring; 304. a slide hole; 305. a raceway; 4. a mounting plate; 5. inserting and combining a fixing piece; 6. a protruding shaft; 7. a locking member; 8. a ferrule; 9. a support; 10. an extension member; 11. a pin shaft; 12. a sheath; 13. a first roller; 14. a universal coupling structure; 141. a U-shaped piece; 142. a first cross rotating shaft; 143. a U-shaped piece II; 144. a first plug bush; 145. a key shaft; 146. a second plug bush; 147. a U-shaped piece III; 148. a second cross rotating shaft; 149. a U-shaped piece; 15. a driven shaft; 16. an upper cutting sleeve; 17. a lower cutting sleeve; 18. a second roller; 19. bevel pinion; 20. a panel; 21. a ring sleeve; 22. a rotating sleeve; 221. hemispherical pits; 23. an upper abutting piece; 24. a lower abutting member; 241. a spiral groove; 25. a high-strength spring; 26. a third roller; 27. a slide bar; 28. a fourth roller; 29. a support arm; 30. an upper joint bowl; 31. penetrating a groove; 32. a connecting rod; 33. and a lower joint bowl.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 24, as an embodiment of the present invention, the flexible connection structure of a blade grid of a large-volume noise reduction and vibration reduction fan includes a combined sleeve formed by coaxially and detachably connecting an upper connecting sleeve 2 and a lower connecting sleeve 3, wherein a mounting plate 4 is fixedly arranged at one end of the combined sleeve, and a plurality of blade grids 1 are uniformly distributed on the mounting plate 4 along the circumference;
referring to fig. 5, the blade grid 1 is fixedly connected with the inserting fixing piece 5 through bolts, and the inserting fixing piece 5 is fixedly inserted with a convex shaft 6 along the length direction; specifically, the insertion fixing piece 5 is provided with a through hole, and the protruding shaft 6 is inserted into the through hole;
referring to fig. 9 to 10, in order to increase the connection stability between the protruding shaft 6 and the inserting fixing member 5, a locking member 7 is further sleeved on the protruding shaft 6, a locking hole is blocked on the locking member 7 along the radial direction of the protruding shaft 6, and the locking hole is screwed into the protruding shaft 6 along the radial direction of the protruding shaft 6 by a bolt, so as to lock the protruding shaft 6 and the locking member 7, and ensure that no relative rotation and no axial sliding between the protruding shaft 6 and the locking member 7 occur.
Referring to fig. 11, in addition, a lug is integrally disposed on one side of the locking member 7, the lug is located at an eccentric position of the protruding shaft 6, and the lug is fixedly connected with the inserting fixing member 5 through a bolt.
By arranging the lugs and the inserting fixing piece 5 to be connected through bolts, the locking piece 7 is ensured not to rotate relative to the inserting fixing piece 5, and the protruding shaft 6 is ensured not to rotate relative to the inserting fixing piece 5.
The convex shaft 6 is connected with the combined sleeve through a torsion yielding component and an offset component respectively, wherein the torsion yielding component is used for allowing the blade grid 1 to flexibly twist around the axis of the convex shaft 6 when the blade grid 1 works (when the central axis of the blade grid 1 winding combined sleeve rotates), so as to reduce overload torsion aerodynamic resistance and torsion vibration of the blade grid 1;
the deflection assembly is used for allowing the flexible deflection of the blade cascade 1 against the direction of rotation of the central axis of the blade cascade 1 winding assembly when the blade cascade 1 is in operation so as to reduce overload rotation resistance and deflection vibration of the blade cascade 1.
Referring to fig. 3, because the cascade 1 itself has a certain curvature torsion angle, airflow and wind can be generated when the cascade 1 is rotated around the assembly.
When the blade row 1 is in operation, the blade row 1 is always subjected to an aerodynamic resistance by the action of air resistance, which is a torsional resistance of the blade row 1 around the axis of the protruding shaft 6, and the direction of the vector can be identified with reference to F1 in fig. 3.
When the cascade 1 widely used and designed in industry is basically connected with the mounting plate 4 in a fixed manner, and the fan runs under overload and ultra-high load, the cascade 1 needs to bear larger rotation resistance torque, which exceeds the maximum rotation resistance torque which can be born by the design of the cascade 1.
In addition, since the rotation resistance torque borne by the blade cascade 1 exceeds the designed maximum value, that is, the blade cascade 1 needs to bear the overload rotation resistance torque, the blade cascade 1 can elastically yield and deform during the working process, thereby increasing vibration and leading to noise improvement.
In the long term, the blade cascade 1 is deformed by plastic yielding due to light weight, namely the curvature torsion angle of the blade cascade 1 is reduced, and the blade cascade tends to be flattened; the weight causes the blade row 1 to twist fracture without being subjected to an overload of torsional shear stress.
It should be noted that, factors causing overload and ultra-high load operation of the fan mainly include actual rotation speed and ambient wind power; the blade grid 1 of the fan rotates to drive the assembly sleeve member to rotate mainly through a motor or an output shaft of the motor, so that the mounting plate 4 is driven to rotate, and finally, the central axis of the blade grid 1 winding assembly sleeve member is driven to rotate.
In terms of expansion, the design of the blade grid 1 of the fan is carried out based on the simulation condition of the static wind environment, namely the ambient wind force is zero; under the premise, when the rotation speed of the motor or the electric machine reaches the designed maximum rotation speed (the rotation speed of the motor or the electric machine generally designs a multi-gear adjustable mode, and the maximum rotation speed corresponds to the highest gear), the blade grid 1 also reaches the designed maximum rotation speed, and the rotation resistance torque born by the blade grid 1 reaches the designed maximum value.
Theoretically, the factors that cause the fan to operate at overload and very high loads include two points:
firstly, after the cascade 1 reaches the designed highest rotation speed, the rotation speed of the cascade 1 is further increased; at this time, the rotation resistance torque applied to the blade cascade 1 exceeds the design maximum value that can be borne by the blade cascade 1, so that the blade cascade 1 is in overload operation.
Secondly, after the blade cascade 1 reaches the designed maximum rotation speed, the action of environmental wind force leads the rotation resistance torque born by the blade cascade 1 to exceed the designed maximum value born by the blade cascade 1, namely the blade cascade 1 bears overload rotation resistance torque; for example, when the rotational speed of the cascade 1 reaches the design maximum value, the wind generating direction is forward, and the ambient wind direction is reverse, the rotation resistance torque received by the cascade 1 is further increased on the basis of the highest rotation resistance torque received by the cascade 1; and the larger the ambient wind force is, the larger the rotating resistance torque which the blade grid 1 is in super compliance with bears is.
The problem cannot be completely solved in the design link due to uncertainty of the ambient wind power.
For both cases, case one does not occur substantially, but case two is unavoidable.
According to the invention, the arranged torsion abdication component is utilized, so that the blade grating 1 of the fan runs under the overload and ultrahigh load conditions, and the blade grating 1 can be allowed to flexibly twist around the axis of the convex shaft 6, so that the overload torsion aerodynamic resistance of the blade grating 1 is reduced, and the rigid yield deformation and torsion fracture of the blade grating 1 are avoided as much as possible; in addition, the overload torsional vibration of the blade grid 1 can be relieved, and the noise is reduced.
Referring to fig. 4, when the cascade 1 is operated, not only a rotation resistance torque but also a rotation resistance exists, wherein the rotation resistance can refer to F2 in fig. 4 to identify a vector direction.
Likewise, under the action of ambient wind, this rotational resistance also exceeds the designed maximum value, which results in the blade row 1 being operated with an overload rotational resistance, with the risk of the blade row 1 bending or even breaking in the direction F2. At the same time, the overload rotational resistance also increases the vibration of the cascade 1 in the direction F2 in fig. 4. To overcome this problem, the present invention provides an offset assembly that allows the cascade 1 to be flexibly offset against the direction of rotation of the central axis of the cascade 1 winding assembly to mitigate overload rotational resistance and yaw shock of the cascade 1.
Referring to fig. 8 and 10, a plurality of extending members 10 are fixedly installed at the edge of the mounting plate 4 at equal intervals along the circumference, and the offset assembly comprises a supporting member 9 rotatably connected with the extending members 10; the convex shaft 6 is rotatably arranged on the supporting piece 9 so as to connect the blade grid 1 with the supporting piece 9;
a pin shaft 11 is fixedly arranged on the bearing member 9, and the bearing member 9 is rotatably connected with the extension member 10 through the pin shaft 11;
the offset assembly further comprises a deflection elastic structure connecting the assembly kit and the support 9.
Because the supporting piece 9 is rotationally connected with the extending piece 10 through the pin shaft 11, when the cascade 1 runs in overload, the cascade 1 can deviate against the rotation direction of the cascade 1, and meanwhile, the cascade 1 can flexibly deviate by absorbing energy through the deflection elastic structure; through the energy absorption of the deflection elastic structure, partial rotation resistance and deflection vibration of the blade grating 1 are absorbed, the risk that the blade grating 1 is bent or even broken along the F2 direction is avoided as much as possible, and deflection noise is reduced.
As a further solution of the present invention, referring to fig. 8, 18 and 20, the deflection elastic structure includes a lower joint bowl 33 fixedly installed at one end of the supporting member 9, an upper joint bowl 30 slidably installed along the axial direction of the upper connecting sleeve 2, an upper abutting member 23 disposed at the inner top end of the assembly and slidably engaged with the interior of the assembly, a lower abutting member 24 disposed at the inner bottom end of the assembly and slidably engaged with the interior of the assembly, a connecting rod 32 having both ends respectively ball-jointed with the upper joint bowl 30 and the lower joint bowl 33, and a high strength spring 25 disposed between the upper abutting member 23 and the lower abutting member 24;
the high-strength spring 25 is pressed by the upper abutting piece 23 and the lower abutting piece 24 in the combined set, a through groove 31 is formed in the upper circumferential direction of the upper connecting sleeve 2 along the axial direction of the upper connecting sleeve 2, the upper joint bowl 30 is fixed on one end of the support arm 29, which extends out of the upper connecting sleeve 2, the support arm 29 penetrates through the through groove 31, the other end of the support arm 29 is fixed with the upper abutting piece 23, and the support arm 29 is in sliding fit with the through groove 31.
Referring to fig. 3, 6, 8 and 12, when the cascade 1 is in overload operation, the cascade 1 can be offset along the direction F2 in fig. 4 around the pin 11, and during the offset rotation of the cascade 1 around the pin 11, the lower joint bowl 33 also offset rotates around the pin 11 and pulls the upper joint bowl 30 to move downwards through the connecting rod 32; the upper joint bowl 30 drives the upper abutting piece 23 to move downwards through the support arm 29, and the upper abutting piece 23 further compresses the upper end of the high-strength spring 25; the high-strength springs 25 are further compressed to absorb energy, and part of rotation resistance and deflection vibration of the blade grid 1 are absorbed.
Note that, in the static wind environment, when the blade cascade 1 reaches the designed maximum rotation speed, the rotation resistance born by the blade cascade 1 reaches the designed maximum value, and at this time, the downward force of the rotation resistance of the blade cascade 1 to the upper abutting piece 23 is equal to the elastic force of the upper abutting piece 23 given by the upper end of the high-strength spring 25, and the high-strength spring 25 is in an elastic balance state; the upper abutment member 23 will only move downwards when the cascade 1 is in overload operation (due to environmental wind forces).
As a further aspect of the present invention, referring to fig. 6, 8, 9 and 10, the protruding shaft 6 is specifically rotatably mounted to the supporting member 9 by the following structure:
a hoop 8 is fixedly arranged on the supporting member 9, and the protruding shaft 6 penetrates through the hoop 8 and is in running fit with the hoop 8;
in order to prevent the protruding shaft 6 and the ferrule 8 from moving axially, a sleeve 12 is fixedly arranged on the periphery of one end of the protruding shaft 6 penetrating out of the ferrule 8, a circle of first rollers 13 are embedded on the outer wall of one side, close to the ferrule 8, of the sleeve 12 in a rolling manner, and the first rollers 13 are in rolling abutting connection with the side wall of the ferrule 8.
Wherein, the sheath 12 is radially provided with a positioning hole, the protruding shaft 6 penetrates out of a section of the outer wall of the ferrule 8 and is provided with a countersunk hole, and the countersunk hole and the positioning hole are fixed by a positioning bolt, thereby preventing the sheath 12 and the protruding shaft 6 from generating axial movement.
By means of the arranged hoops 8 and the sleeve 12, the protruding shaft 6 and the supporting piece 9 can only rotate relatively and cannot move axially.
As a still further solution of the present invention, referring to fig. 20 and 24, a sliding rod 27 is fixed at the lower portion of the lower abutting member 24, a bushing 303 is integrally disposed below the lower portion of the lower connecting sleeve 3, a sliding hole 304 is formed in the bushing 303, and the sliding rod 27 is slidably inserted into the sliding hole 304.
The sliding fit between the lower abutting piece 24 and the lower connecting sleeve 3 is realized by sliding and inserting the sliding rod 27 and the sliding hole 304, namely, the lower abutting piece 24 can only slide up and down in the combined set and cannot rotate.
As a still further aspect of the present invention, referring to fig. 6, 7, 8, 18 and 20, the torsion yielding assembly includes a transmission mechanism, a rotating sleeve 22 connected to the transmission mechanism and rotatably disposed on the lower connecting sleeve 3, and a spiral structure connecting the rotating sleeve 22 and the lower abutting member 24;
the transmission mechanism is connected with one end of the protruding shaft 6 penetrating out of the sleeve ring 8, a circle of annular concave 301 is arranged outside the lower connecting sleeve 3, and the rotating sleeve 22 is rotationally embedded on the annular concave 301 so as to prevent the rotating sleeve 22 from axially moving relative to the lower connecting sleeve 3; the spiral structure is used for driving the lower abutting piece 24 to move upwards in the combined set when the rotating sleeve 22 rotates.
When the blade row 1 is in operation, an aerodynamic resistance is always exerted to torsion about the axis of the protruding shaft 6, i.e. the rotational resistance torque of the blade row 1 (F1 in fig. 3 indicates the vector direction). Under the influence of the rotation resistance torque, the transmission mechanism always has a trend of driving the rotating sleeve 22 to rotate, the rotating sleeve 22 gives the lower abutting piece 24 an upward moving thrust through the spiral structure, and the lower abutting piece 24 further compresses the lower end of the high-strength spring 25 to absorb energy and absorb part of torsion resistance and torsion vibration of the blade grid 1.
It should also be noted that, in a static wind environment, when the cascade 1 reaches the designed maximum rotational speed, the rotation resistance torque borne by the cascade 1 reaches the designed maximum value. At this time, the thrust force of the rotation resistance torque transmitted to the lower abutting piece 24 through the rotating sleeve 22 and the spiral structure is equal to the elastic force given to the lower abutting piece 24 by the lower end of the high-strength spring 25, and the high-strength spring 25 is in an elastic balance state; only when the blade row 1 is in overload operation (due to environmental wind), will the lower abutment member 24 move upwards.
In combination with the above features, it is apparent that when the cascade 1 is rotationally operated, the cascade 1 is subjected to wind resistance to generate a torsional resistance in the direction of the F1 vector as shown in fig. 3 and a deflection resistance in the direction of the F2 vector as shown in fig. 4.
The torsional resistance is transmitted to the lower abutting member 24, so that the lower abutting member 24 has a tendency to move upwards;
the deflection resistance is conducted to the upper abutting piece 23, so that the upper abutting piece 23 has a downward movement tendency;
the upper and lower interference members 23 and 24 give further compressive force to the high-strength spring 25 from the upper and lower ends of the high-strength spring 25, respectively. Since the high-strength spring 25 is compressed after being assembled into the assembly kit, the high-strength spring 25 has an initial pre-compression elasticity; when the windage resistance of the blade grid 1 reaches the designed maximum load, the high-strength spring 25 is in a balanced state; once the environmental counter-wind forces act on the blade row 1, such that the blade row 1 is subjected to a resistance exceeding the designed maximum load, the upper abutment member 23 will move slightly downwards and the lower abutment member 24 will move slightly upwards.
When the upper abutting member 23 is split into two parts, the high-strength spring 25 is further compressed by the downward movement of the upper abutting member 23, so that the upward movement resistance of the lower abutting member 24 is increased; similarly, the upward movement of the lower abutting member 24 further compresses the high strength spring 25, so that the downward movement resistance of the upper abutting member 23 is increased; that is, the torsion resistance and the deflection resistance of the blade row 1 exert the effect of restraining each other, and the blade row 1 is prevented from being greatly twisted and deflected.
As a still further aspect of the present invention, referring to fig. 21, the rotating sleeve 22 is specifically rotatably engaged in the annular recess 301 by the following structure:
the rotating sleeve 22 comprises two semi-annular hoops, and the two semi-annular hoops are encircled to form the rotating sleeve 22;
referring to fig. 20 and 22, a plurality of fourth rollers 28 are disposed on the inner wall of the anchor ear along the circumferential direction thereof, a raceway 305 is disposed on the annular recess 301, and the fourth rollers 28 are engaged with the raceway 305 in a rolling manner.
The rotating sleeve 22 is arranged into two semi-annular hoops, so that the rotating sleeve 22 is conveniently assembled in the annular recess 301 on the lower connecting sleeve 3; the fourth roller 28 and the raceway 305 are arranged to cooperate, so that on the one hand, the rotational friction force between the rotor 22 and the annular recess 301 can be reduced, and on the other hand, the pressing friction between the rotor 22 and the annular recess 301 in the axial direction can be reduced.
As a still further aspect of the present invention, referring to fig. 19 to 24, the annular recess 301 is provided with a hollow groove 302 communicated with the interior of the assembly;
the spiral structure comprises a spiral groove 241 formed on the outer wall of the lower abutting piece 24, a third roller 26 which is in rolling fit with the spiral groove 241, and a hemispherical pit 221 formed on the inner wall of the rotating sleeve 22;
the half part of the third roller 26 facing the inner side of the combination sleeve is engaged in the spiral groove 241 in a rolling manner, and the half part facing the outer side of the combination sleeve is engaged with the hemispherical concave pit 221 through the hollowed-out groove 302.
When the rotation resistance torque of the blade grid 1 breaks through the pre-pressing elastic force of the high-strength spring 25, the transmission mechanism drives the rotating sleeve 22 to rotate, and the rotating sleeve 22 drives the third roller 26 to rotate around the central axis of the assembly piece in the rotating process; since the lower abutting member 24 is restrained by the slide bar 27 and the slide hole 304, the lower abutting member 24 cannot follow rotation, and thus, the third roller 26 gives an upward moving force to the lower abutting member 24 through the spiral groove 241 during rotation of the third roller 26 around the central axis of the clutch assembly.
As a still further aspect of the present invention, referring to fig. 12 to 21, the transmission mechanism includes a universal coupling structure 14 having one end connected to the male shaft 6 and the other end connected to the driven shaft 15;
a bevel pinion 19 is fixed at one end of the driven shaft 15, the driven shaft 15 is rotatably mounted on a panel 20, and the panel 20 is fixed at the edge of the mounting plate 4;
the outer part of the rotating sleeve 22 is fixedly provided with a ring sleeve 21, the lower end of the ring sleeve 21 is provided with a large bevel gear, and the large bevel gear is meshed with the small bevel gear 19.
In the process of rotating the protruding shaft 6, the driven shaft 15 is driven to rotate by the universal coupling structure 14, the rotating driven shaft 15 drives the small bevel gear 19 to rotate, and then drives the large bevel gear and the ring sleeve 21 to rotate, and finally drives the rotating sleeve 22 to rotate.
As a still further aspect of the present invention, referring to fig. 16 and 17, a ferrule structure is fixedly disposed on the panel 20, and the driven shaft 15 is in rotation fit with the ferrule structure; the cutting sleeve structure comprises an upper cutting sleeve 16 and a lower cutting sleeve 17 which are detachably connected, and the side edges of the cutting sleeve structure roll and are embedded with a plurality of second rollers 18 along the circumference at equal intervals;
the driven shaft 15 is provided with a flange at one end far away from the bevel pinion 19, the second roller 18 on one side of the cutting sleeve structure is in rolling fit with the flange, and the second roller 18 on the other side of the cutting sleeve structure is in rolling fit with the side wall of the bevel pinion 19.
The upper cutting ferrule 16 and the lower cutting ferrule 17 which are detachable are matched to form a cutting ferrule structure, so that the driven shaft 15 is kept to be rotatably arranged on the panel 20; simultaneously, the second rollers 18 on two sides of the clamping sleeve structure are respectively in rolling fit with the flange and the bevel pinion 19, so that the friction resistance between the driven shaft 15 and the side end face of the clamping sleeve structure is reduced.
As a still further aspect of the present invention, referring to fig. 13 to 16, the universal coupling structure 14 includes a first U-shaped member 141, a first cross-shaped shaft 142, a second U-shaped member 143, a first socket 144, a key shaft 145, a second socket 146, a third U-shaped member 147, and a second cross-shaped shaft 148;
one end of the first U-shaped member 141 is fixedly connected with the protruding shaft 6, the other end of the first U-shaped member 141 is in running fit with two longitudinal ends of the first cross rotating shaft 142, and two transverse ends of the first cross rotating shaft 142 are in running fit with one end of the second U-shaped member 143;
the other end of the second U-shaped piece 143 is fixedly provided with a first plug bush 144, the inner wall of the first plug bush 144 is provided with a key slot, and the first plug bush 144 is in telescopic sliding fit with one end of a key shaft 145 through the key slot on the first plug bush 144;
a key slot is also formed on the inner wall of the second plug bush 146, and the second plug bush 146 is in telescopic sliding fit with the other end of the key shaft 145 through the key slot thereon;
the second plug bush 146 is fixed at one end of the third U-shaped member 147, the other end of the third U-shaped member 147 is rotatably connected with two transverse ends of the second cross rotating shaft 148, and two longitudinal ends of the second cross rotating shaft 148 are rotatably connected with one end of the fourth U-shaped member 149;
the other end of the fourth U-shaped member 149 is fixedly connected with the driven shaft 15.
The transmission of the convex shaft 6 and the driven shaft 15 which are positioned on the same plane and have a certain included angle is realized through the universal coupling structure 14; specifically, when the protruding shaft 6 rotates, the first U-shaped member 141 is driven to rotate, and the first U-shaped member 141 drives the second U-shaped member 143 to rotate through the first cross rotating shaft 142; the second U-shaped piece 143 drives the third U-shaped piece 147 to rotate by utilizing the first plug bush 144, the key shaft 145 and the second plug bush 146; the third U-shaped piece 147 drives the fourth U-shaped piece 149 to rotate through the second cross rotating shaft 148, and finally drives the driven shaft 15 to rotate.
Because the second U-shaped piece 143 and the third U-shaped piece 147 are in telescopic sliding fit through the two sleeved key shafts 145, the distance between the second U-shaped piece 143 and the third U-shaped piece 147 is allowed to be reduced in the process of swinging the protruding shaft 6 around the pin shaft 11, and further the transmission between the protruding shaft 6 and the driven shaft 15 can still be kept, namely, the rotation of the protruding shaft 6 is not influenced in the process of swinging the protruding shaft 6 around the pin shaft 11, and the rotation of the driven shaft 15 is driven.
The invention also provides a self-adjusting method of the flexible connecting structure for the blade grid of the large-air-volume noise-reduction damping fan, which is exactly a self-adjusting method when the blade grid 1 runs under the overload and ultrahigh load conditions;
the whole process of starting the fan is specifically as follows:
in the starting acceleration stage, the combined sleeve member is driven to rotate through the output shaft of the motor or the motor, so that the mounting plate 4 is driven to rotate, and finally the central axis of the blade grid 1 winding combined sleeve member is driven to continuously accelerate and rotate, so that the torsional pneumatic resistance and the rotational resistance born by the blade grid 1 are continuously increased;
wherein, the torsional aerodynamic resistance is transmitted to the torsional yielding assembly through the protruding shaft 6, and the torque driving the lower abutting piece 24 to slide upwards is continuously increased; the rotation resistance is transmitted to the offset component through the bearing piece 9, and the moment for driving the upper abutting piece 23 to slide downwards is continuously increased;
in the critical balance stage, the upward sliding moment of the lower abutting piece 24 acts on the lower end of the high-strength spring 25, the downward sliding moment of the upper abutting piece 23 acts on the upper end of the high-strength spring 25, and the moments of the upper abutting piece 23 and the lower abutting piece 24 acting on the high-strength spring 25 from the upper end and the lower end are balanced with the initial pre-pressing elastic force of the high-strength spring 25;
in the overload operation stage, due to the reverse wind force action of the turbulent environment, the torsion pneumatic resistance and the rotation resistance borne by the blade grid 1 break through the design maximum value intermittently, so that the moment acted on the high-strength spring 25 by the upper abutting piece 23 and the lower abutting piece 24 from the upper end and the lower end breaks through the initial pre-compression elastic force of the high-strength spring 25 intermittently;
when the moment of the upper abutting piece 23 and the lower abutting piece 24 acting on the high-strength spring 25 breaks through the initial pre-pressing elastic force of the high-strength spring 25, the upper abutting piece 23 slides downwards, the lower abutting piece 24 slides upwards, the high-strength spring 25 is further compressed, the blade grid 1 is twisted and deflected to give way, and the overall resistance of the blade grid 1 is reduced; meanwhile, the high-strength springs 25 are utilized to further compress and absorb energy, so that deflection vibration and torsion vibration of the blade cascade are reduced.
The above-described embodiments are illustrative, not restrictive, and the technical solutions that can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention are included in the present invention.

Claims (10)

1. The flexible connection structure of the blade grid of the large-air-volume noise-reduction damping fan comprises a combined sleeve, wherein the combined sleeve is formed by coaxially and detachably connecting an upper connecting sleeve (2) and a lower connecting sleeve (3); one end of the combined sleeve is fixedly provided with a mounting disc (4), and a plurality of blade grids (1) are mounted on the mounting disc (4) in an equidistant circumferential distribution manner;
the blade grid (1) is fixedly connected with the inserting fixing piece (5) through bolts, and the inserting fixing piece (5) is fixedly inserted with a convex shaft (6) along the length direction of the inserting fixing piece;
the method is characterized in that: the convex shaft (6) is connected with the combined sleeve through a torsion abdication component and an offset component respectively, wherein the torsion abdication component is used for allowing the blade grid (1) to flexibly twist around the axis of the convex shaft (6) when the blade grid (1) works so as to reduce overload torsion aerodynamic resistance and torsion vibration of the blade grid (1);
the deflection assembly is used for allowing the blade grid (1) to flexibly deflect against the rotation direction of the central axis of the blade grid (1) winding assembly when the blade grid (1) works so as to reduce overload rotation resistance and deflection vibration of the blade grid (1).
2. A flexible connection structure of a large-air-volume noise-reduction and vibration-reduction fan blade grid according to claim 1, wherein a plurality of extension pieces (10) are fixedly installed at the edge of the mounting plate (4) along the circumference at equal intervals, and the offset assembly comprises a supporting piece (9) rotationally connected with the extension pieces (10); the convex shaft (6) is rotatably arranged on the supporting piece (9) so as to connect the blade grid (1) with the supporting piece (9);
a pin shaft (11) is fixedly arranged on the bearing piece (9), and the bearing piece (9) is rotationally connected with the extension piece (10) through the pin shaft (11);
the offset assembly further comprises a deflection elastic structure connecting the combination set and the bearing piece (9).
3. The flexible connection structure of the blade grid of the large-air-volume noise-reduction and vibration-reduction fan according to claim 2, wherein the deflection elastic structure comprises a lower joint bowl (33) fixedly installed at one end of the supporting piece (9), an upper joint bowl (30) which can slide along the axial direction of the upper connecting sleeve (2), an upper abutting piece (23) which is arranged at the inner top end of the combined sleeve and is in sliding fit with the inside of the combined sleeve, a lower abutting piece (24) which is arranged at the inner bottom end of the combined sleeve and is in sliding fit with the inside of the combined sleeve, a connecting rod (32) with two ends respectively in ball joint with the upper joint bowl (30) and the lower joint bowl (33), and a high-strength spring (25) which is positioned between the upper abutting piece (23) and the lower abutting piece (24);
the high-strength spring (25) is extruded by the upper abutting piece (23) and the lower abutting piece (24) in the combined sleeve, a through groove (31) is formed in the upper circumferential direction of the upper connecting sleeve (2) along the axial direction of the upper connecting sleeve (2), the upper joint bowl (30) is fixed on the support arm (29) and extends out of one end of the upper connecting sleeve (2), the support arm (29) penetrates through the through groove (31), the other end of the support arm (29) is fixed with the upper abutting piece (23), and the support arm (29) is in sliding fit with the through groove (31).
4. The flexible connection structure for the blade grid of the large-air-volume noise-reduction and vibration-reduction fan according to claim 3, wherein a sliding rod (27) is fixed at the lower part of the lower abutting piece (24), a lining ring (303) is integrally arranged below the lower connecting sleeve (3), a sliding hole (304) is formed in the lining ring (303), and the sliding rod (27) is in sliding insertion with the sliding hole (304).
5. A fan blade grid flexible connection structure with large air volume and noise reduction and shock absorption according to claim 3, wherein the torsion abdication assembly comprises a transmission mechanism, a rotating sleeve (22) connected with the transmission mechanism and rotatably arranged on the lower connecting sleeve (3), and a spiral structure connected with the rotating sleeve (22) and the lower abutting piece (24);
the transmission mechanism is connected with one end of the protruding shaft (6) penetrating out of the hoop (8), a circle of annular concave (301) is arranged outside the lower connecting sleeve (3), and the rotating sleeve (22) is rotationally embedded on the annular concave (301); the spiral structure is used for driving the lower abutting piece (24) to move upwards in the combined sleeve when the rotating sleeve (22) rotates.
6. The flexible connection structure of the blade grid of the large-air-volume noise-reduction and vibration-reduction fan according to claim 5, wherein the annular recess (301) is provided with a hollowed-out groove (302) communicated with the inside of the combined sleeve;
the spiral structure comprises a spiral groove (241) formed in the outer wall of the lower abutting piece (24), a third roller (26) in rolling fit with the spiral groove (241), and a hemispherical pit (221) formed in the inner wall of the rotating sleeve (22);
the half part of the third roller (26) facing the inner side of the combination sleeve is embedded in the spiral groove (241) in a rolling way, and the half part facing the outer side of the combination sleeve passes through the hollowed-out groove (302) to be embedded with the hemispherical pit (221).
7. The flexible connection structure of the blade grid of the large-air-volume noise-reduction and vibration-reduction fan according to claim 5, wherein the transmission mechanism comprises a universal coupling structure (14) with one end connected with the convex shaft (6) and the other end connected with the driven shaft (15);
a bevel pinion (19) is fixed at one end of the driven shaft (15), the driven shaft (15) is rotatably arranged on a panel (20), and the panel (20) is fixed at the edge of the mounting disc (4);
the outer part of the rotating sleeve (22) is fixedly provided with a ring sleeve (21), the lower end of the ring sleeve (21) is provided with a large bevel gear, and the large bevel gear is meshed with the small bevel gear (19).
8. The flexible connection structure of the blade grid of the large-air-quantity noise-reduction and vibration-reduction fan according to claim 7, wherein a clamping sleeve structure is fixedly arranged on the panel (20), and the driven shaft (15) is in rotary fit with the clamping sleeve structure; the cutting sleeve structure comprises an upper cutting sleeve (16) and a lower cutting sleeve (17) which are detachably connected, and side edges of the cutting sleeve structure are in rolling fit with a plurality of second rollers (18) along the circumference at equal intervals;
the driven shaft (15) is provided with a flange at one end far away from the bevel pinion (19), the second roller (18) at one side of the cutting sleeve structure is in rolling fit with the flange, and the second roller (18) at the other side of the cutting sleeve structure is in rolling fit with the side wall of the bevel pinion (19).
9. The flexible connection structure of a large-air-volume noise-reduction and vibration-reduction fan blade grid according to claim 8, wherein the universal coupling structure (14) comprises a U-shaped piece (141), a cross rotating shaft (142), a U-shaped piece (143), a plug bush (144), a key shaft (145), a plug bush (146), a U-shaped piece (147) and a cross rotating shaft (148);
one end of the first U-shaped part (141) is fixedly connected with the protruding shaft (6), the other end of the first U-shaped part (141) is in rotary fit with two longitudinal ends of the first cross rotating shaft (142), and two transverse ends of the first cross rotating shaft (142) are in rotary fit with one end of the second U-shaped part (143);
the other end of the second U-shaped piece (143) is fixedly provided with a first plug bush (144), a key slot is formed in the inner wall of the first plug bush (144), and the first plug bush (144) is in telescopic sliding fit with one end of a key shaft (145) through the key slot on the first plug bush;
a key slot is also formed in the inner wall of the second plug bush (146), and the second plug bush (146) is in telescopic sliding fit with the other end of the key shaft (145) through the key slot on the second plug bush;
the second plug bush (146) is fixed at one end of a third U-shaped piece (147), the other end of the third U-shaped piece (147) is rotationally connected with two transverse ends of a second cross rotating shaft (148), and two longitudinal ends of the second cross rotating shaft (148) are rotationally connected with one end of a fourth U-shaped piece (149);
the other end of the fourth U-shaped piece (149) is fixedly connected with a driven shaft (15).
10. A method for self-adjusting a blade grid of a fan with large air volume and noise reduction and shock absorption by a flexible connection structure according to claim 8, wherein when the moment acting on the high-strength spring (25) by the upper abutting piece (23) and the lower abutting piece (24) breaks through the initial pre-pressing elastic force of the high-strength spring (25), the upper abutting piece (23) slides downwards, the lower abutting piece (24) slides upwards, the high-strength spring (25) is further compressed, the blade grid (1) is twisted and deflected to give way, and the integral resistance of the blade grid (1) is reduced; meanwhile, the high-strength spring (25) is used for further compressing and absorbing energy, so that deflection vibration and torsion vibration of the blade cascade are reduced.
CN202311552043.6A 2023-11-20 2023-11-20 Large-air-volume noise-reduction vibration-reduction fan blade grid flexible connection structure and self-adjusting method thereof Active CN117588352B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003042053A (en) * 2001-08-01 2003-02-13 Chiyuu Hayashi Windmill for wind power generation
WO2009059491A1 (en) * 2007-11-07 2009-05-14 Guangshun Wang A flexible variable paddle mechanism of a wind power generator
CN201615026U (en) * 2009-06-22 2010-10-27 华锐风电科技(集团)股份有限公司 Moment connecting arms of gear case of wind turbine generator system
CN102691619A (en) * 2012-06-13 2012-09-26 上海应用技术学院 Automatic variable-pitch speed regulating device based on air speed
CN106870291A (en) * 2017-04-13 2017-06-20 青岛科技大学 Feather angle wind power generation plant
CN110067698A (en) * 2019-03-30 2019-07-30 杨凯 The adaptive polymorphic deflection adjusting method of blade of wind-driven generator
CN111594380A (en) * 2020-04-03 2020-08-28 贵州电网有限责任公司 Small-size aerogenerator aircraft nose of variable oar
CN113374641A (en) * 2021-07-12 2021-09-10 江苏慧之能风力发电有限公司 Wind driven generator with wind resistance reducing blades
CN113982821A (en) * 2021-10-27 2022-01-28 张静贺 Blade damping device of wind driven generator
CN217976448U (en) * 2021-09-23 2022-12-06 姜宝义 High-efficiency automatic angle-changing speed-regulating multi-blade wind wheel device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003042053A (en) * 2001-08-01 2003-02-13 Chiyuu Hayashi Windmill for wind power generation
WO2009059491A1 (en) * 2007-11-07 2009-05-14 Guangshun Wang A flexible variable paddle mechanism of a wind power generator
CN201615026U (en) * 2009-06-22 2010-10-27 华锐风电科技(集团)股份有限公司 Moment connecting arms of gear case of wind turbine generator system
CN102691619A (en) * 2012-06-13 2012-09-26 上海应用技术学院 Automatic variable-pitch speed regulating device based on air speed
CN102926932A (en) * 2012-06-13 2013-02-13 上海应用技术学院 Automatic blade-changing speed-regulating device based on wind speed
CN106870291A (en) * 2017-04-13 2017-06-20 青岛科技大学 Feather angle wind power generation plant
CN110067698A (en) * 2019-03-30 2019-07-30 杨凯 The adaptive polymorphic deflection adjusting method of blade of wind-driven generator
CN111594380A (en) * 2020-04-03 2020-08-28 贵州电网有限责任公司 Small-size aerogenerator aircraft nose of variable oar
CN113374641A (en) * 2021-07-12 2021-09-10 江苏慧之能风力发电有限公司 Wind driven generator with wind resistance reducing blades
CN217976448U (en) * 2021-09-23 2022-12-06 姜宝义 High-efficiency automatic angle-changing speed-regulating multi-blade wind wheel device
CN113982821A (en) * 2021-10-27 2022-01-28 张静贺 Blade damping device of wind driven generator

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